The compartment at the bottom is a place for you to put fruit in to flavor your water. This 28 oz. Tumbler is in a pretty teal color. AUTOSPOUT TECHNOLOGY: Spout pops up for easy drinking from the straw; seals with straw down for no spills LOCK IT IN: Button lock ensures the spout doesn’t open accidentally CARRY ON: Integrated handle makes it easier & more comfortable to pick up and go like new